Plug



FIG. 1 is a top, front, right side perspective view of a plug showing a first embodiment of our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The even-broken lines of the figures represent portions of the plug that form no part of the claimed design. The long dash-short dash broken lines define boundaries of the claimed design, and form no part of the claimed design. 

CLAIM The ornamental design for a plug, as shown and described. 